Ultra-sonic welding horn



FIG. 1 is a perspective view of ultra-sonic welding horn embodying my new design;

FIG. 2 is an end view; and,

FIG. 3 is a fragmentary sectional view greatly enlarged taken along lines 3--3 of FIG. 2.

The broken line showing of the welding horn upper body is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an ultra-sonic welding horn, as shown. 